I recentyly attended a presentation by the man who owns Rust Coins. I don't recall his first name. He has an amazing amount of information about the coins and tokens made and used by the church. He wrote a book several years ago compiling all of the information he has gathered over the years. I would bet that he could help you out. He is very friendly and willing to share his knowledge. Also, I live on the eastern edge of the Black Rock desert and I'm pretty familiar with the area. When you decide to head down I'd be glad to give you some ideas. I would say go in the late fall if you can. The mud is terrible out there until summer. There are hundreds of open mine shafts so be very careful.